Engine governor



x N11.111515, 1944. M, MALLQRY l 2,355,881

ENGINE GOVERNOR I Filed March 31, 1944 l tion of my engine speed governor.

communicates with channel 23.

, Patented Aug. 15, 1944 UNITED STATES PATENT OFFICE s A 2,355,881 l ENGmE GOVERNOR Marion Mallory, Detroit, Micht` u `Application March 31, 1944, serial No. 528,331 Y `solicits. (o1. V12a-103)` ernor which will control the speed of an internal' combustion engine kat anypredetermined desired Y speed with greaterjprecisionj and nicety than heretofore possible. 1 1

The drawing shows an elevation partly in sec- I is a governor housing, 2 the inlet and?. the outlet.` 4 is a'valve mounted on shaft 5 and journaled in housing I. 6 is an arm fixed on shaft 5. l is a tension spring connected to one end of `arm 6 and to housing I.` 8 is a suction device provided withA a flexible diaphragm 9 which is connected by rod IIJ with arms 6. II is the suction chamber 'ofsuction device 8. I2 is the atmospheric chamber of suction device Il.`

`I3 is an atmospheric opening into chamber I2. I4 is a conduit connected to suction chamber II and to orifice I5 located in governor housing I.

n I6 is aconduit connected to orifice I1 in governor housing I. I8 is an adjusting valve in conduit I6. I8 is a centrifugal valve housing. centrifugal valveshaft which rotates in bearings 2l. 22 is a groove laround shaft 20` which communicates with channel'23. 24 is a channel that 25 is a` needle valve nxed on centrifugal valve weight 26. 21 is a cylindrical housing (for `valve weight 26) mounted on shaft 20. valve Weight 26 inwardly. 29 is an orifice in centrifugal valve housing I9 whichcommunicates with channel in shaft 20 through groove 22. 30 is an orifice vin centrifugal valve housing I8. 3|

is a conduit-,.1 e

Operation of the device spring 28 will hold centrifugal valve weight 26 inwardly closing channel 23 to channel 24. If spring 28 is adjusted to yield to the centrifugal force of weight 26 when the engine reaches a certain speed, needle valve 25 will open com- 20 is a 28 is a spring which holds` munication between orifice II and suction chami Aber II by way of conduit I6, orifice 28, groove 22,

channel 23, channel 24, orifice 30, and .conduit 3l. 1 The velocity of the charge by orifice I1 and I5 will create suiiicient suction to start governor valve 4 toward a closed position.` As thisvalve moves slightly toward a closedtposition, the suction below it will greatly increase, which increases the suction in chamber II of the suction device, pulling valve 4 toward a closed position to give the desired governing of the engine speed. As valve 4 moves toward a closed position, which greatly increases the suction at orice I1, orifice I5 then begins to be an air-bleed to suction device 8 which prevents a sudden closing or plastering of valve 4. vIf the engine speed should slow down below the governed speed, spring 28 Ywill close needle valve 25, cutting off the communication of orifice I'I to suction device 8. Valve 4 will then `move toward an open position but as it does so the charge will speed up by orice I5 and orice I5 will become a. suction orifice when valve 4 i becomes wide open.` In other words, orice I5 gradually changes from an air-bleed orice to a suction orifice as valve 4 moves toward an open position. This prevents valve 4 from iiying open so rapidly. The orifice I5 functioning `as it does prevents the well-known surging in governors.

Orifice I5 preferably is located in the intake passageway but orifice I5 can connect conduit I4 directly to atmosphere. However, where orifice I5 air bleeds conduit I4 directly to atmosphere, the governor will not operate quite as smoothly and will not govern the speed of the engine without some surging. i

This application i's a continuation-impart of ilrvzapplication Serial No. 446,243, filed June 8,

I claim:

1. The combination with an internal combustion engine having an intake passageway provided with a throttle valve for controlling the 4flow of motive fluid to the engine, means actuated through changes of pressure in the intake passageway on the engine side of said valve for 1mparting movement to said valve, a conduit connecting said pressure actuated means with the intake passageway on the engine side of said throttle valve, and valve means responsive to changes in engine speed for controlling fluid flow through said conduit, said valve means tending to open said conduit whenlthe engine reaches its governed speed and tending to close said conduit when the engine falls below its governed speed.

2. The .combination with an internal combussaid conduit when the engine reaches its governed speed and tending to close said conduit when the engine falls below its governed speed.

3. The combination as set forth in claim 2 including an orice in the intake passageway on the atmosphere side of said throttle valve, and a, second conduit connecting said orifice with the pressure actuated means.

4. The'combination with an internal combus tion engine having an intake passageway providedy with a throttle valve for controlling the flow of motive uid to the engine, means actuated through changes of pressure in the intake passageway on the engine side of said valve for imparting movement to said valve, a conduit connecting said pressure actuated means with the intake passageway onA the engine side of said throttle valve, a rotatable valve housing arranged to vary its speedin accordance with variations in the engine speed, said valve housing being connected into said conduit, and a centriiugally unbalanced valve in said housing rresponsive to changes in the speed of rotation of said valve housing for controlling said conduit, said centrifugally unbalanced valve tending to open said conduit when the engine reaches its governed speed to thereby decrease the pressure in said pressure actuated means and cause 40 said throttle valve to move toward closed position and tending to close said conduit when the engine falls'xbelow its governed speed to thereby increase the pressure in said pressure actuated means vand cause said throttle valve to move toward open position.

5. The combination with an internal combustion engine having an intake passageway provided with a throttle valve for controlling the ow of motive uid to the engine, means actuiated through changes of pressure in the intake passageway on the engine side of said valve for `imparting movement to said valve, a conduit 6. The combination with an internal combustion engine having an intake passageway provided With a throttle valve for controlling the ow of motive fluid to the engine, means actuated through changes of pressure in the intake passageway on the engine side of said valve for imparting movement to said valve, a conduit connecting said pressure actuated means with the intake passageway on the engine side of said throttlevalve, and valve means located in said conduit and responsive to changes in engine speed for controlling fluid flow through said conduit, said valve means tending to open said conduit when the engine reaches its governed speed and tending to close said conduit when the engine falls belowits governed speed, and an air bleed to atmosphere for said pressure actuated means positioned on the pressure actuated means side of said valve means.

'1. The combination with an internal combustion engine having an intake passageway provided With a throttle valve for controlling the ow of motive fluid to the engine, a suction device including a housing and ilexible diaphragm, a connection between the exible diaphragm and the said`throttle valve, a conduit connecting the inside of said housing with an orifice in the intake passagewayon the engine side of said throttle valve, and valve means responsive to changes in engine speed for controlling fluid flow through said conduit, said valve means tending to open said conduit when the engine reaches its governed speed and tending to close said conduit when the engine falls below its governed speed.

48. The combination as set forth in claim 7 including a second conduit connecting the inside of said suction device with an orifice in the intakeI passageway on the atmosphere side of said throttle valve.

9. The combination with an internal .combustion engine having an intake passageway provided with a throttle valvev for controlling the flow of motive uid to the engine, a suction device including a housing and iiexible diaphragm, a connection between the flexible diaphragm and the said throttle valve, a conduit connecting the inside of said housing with an orice in the i11- take passageway on the engine side of said throttle valve, a rotary valve housing connected into said conduit and arranged to'l change its speed of rotation in accordance with changes in the engine speed, ak centrifugally unbalanced valve mounted in said valve housing responsive to changes in engine speed for controlling fluid flow through said conduit, said centrifugally unbalanced valve tending to open said conduit when the engine reaches its governed speed and tending to close said conduit when the engine falls below its governed speed, a second conduit connecting the inside of said suction device with an orice in the intake passageway on the atmosphere side of said throttle valve.

MARION MALLORY. 

